12 Compressed natural gas fuel systems being an attachment to a vehicle comprised of a pipe, flexible tubing, fuel dispenser nozzle, pressure regulator, pressure relief device, and valve, which together form an alternative fuel system and alternative fuel storage system for vehicles, not being a component of a vehicle engine; Fuel systems being an attachment to a vehicle comprised of a pipe, flexible tubing, fuel dispenser nozzle, pressure regulator, pressure relief device, and valve, which together form an alternative fuel system and alternative fuel storage system for vehicles, not being a component of a vehicle engine; Fuel systems being an attachment to a vehicle comprised of a pipe, flexible tubing, fuel dispenser nozzle, pressure regulator, pressure relief device, and valve, all being an alternative fuel system for vehicles, not being a component of a vehicle engine